| License Type |
|---|
| aquaculture license: established in 2017 |
| commercial fishing crew |
| commercial fishing single |
| commercial pelagic and anadromous crew |
| commercial pelagic and anadromous single |
| commercial shellfish |
| commercial shellfish + 70 |
| commercial shellfish under 18 |
| commercial shrimp crew |
| commercial shrimp single |
| eel pot |
| elver |
| elver 1 fyke net |
| elver 1 fyke net crew |
| elver 2 fyke net |
| elver 2 fyke net with crew |
| elver dip net |
| elver dip net 1 fyke net |
| elver dip net 1 fyke net crew |
| elver dip net crew |
| federal halibut crew |
| green crab |
| lobster crab + 70 |
| lobster crab apprentace under 18 |
| lobster crab apprentice |
| lobster crab apprentice + 70 |
| lobster crab class i |
| lobster crab class ii |
| lobster crab class ii + 70 |
| lobster crab class iii |
| lobster crab class iii + 70 |
| lobster crab non commerical |
| lobster crab student |
| lobster crab under 18 |
| marine worm digging |
| menhaden commercial |
| menhaden non commercial |
| mussel boat |
| mussel dragger |
| mussel hand |
| non federal halibut crew |
| non federal halibut single |
| quahog (mahogany) |
| scallop diver |
| scallop dragger |
| scallop non commericial |
| scallop with tender |
| sea cucumber drag |
| sea urchin diver |
| sea urchin dragger |
| sea urchin raking |
| sea urchin with tender |
| seaweed |
| seaweed supplemental |
| spat |
| surf clam boat |
| vibrio harvester |
License Networks
Harvester licenses in Maine
To focus on fishery access and harvester adaptability, we’ve removed indigenous licenses and post-harvest (i.e., processors, wholesalers, etc) from the data set.
Time series of license holdings
Annual License Network Metrics
Degree and betweenness are both ways of measuring centrality.
“The degree of a node is the number of other nodes that single node is connected to.
Important nodes tend to have more connections to other nodes. Highly connected nodes are interpreted to have high degree centrality.”
“[Betweenness] ranks the nodes based on the flow of connections through the network. Importance is demonstrated through high frequency of connection with multiple other nodes. Nodes with high levels of betweenness tend to serve as a bridge for multiple sets of other important nodes.” Source
